Rotary pump



ROTARY PUMP Filed April 19. 1923 object the the same or like parte, Fie il FUNDR'Y COMPANY, A CREQE?.

Application ined April 19, 135223. eria No. 533,112.

To all 'whom if may 'oo/neem:

Be it known that l, lVILFoRD 5,' HAWKINS, e citizen of the United States, residing et Brooklyn, county of Kings, and State et New Improvement in Rotarv Pumps, of which the following is e specification.

This invention relates to an improvementin'rotery pumps,.and it has for its main production of a device of this kind which is there' durable and more ei'iicient then those heretofore in use, and capable et being run et high speed. lVith these and other objeets not speciiioelly mentioned in View, the invention 'onsists in certain constructions end Combinations which will be hereinafter fully described and then specificallyA set forth in the claims lhereunto appended.

in the accompanying drawings, which' forin a. part of this specification, and in whichY like characters of reference indicate e centrel sectional View ofi' e, pum;V cons noted in accorde-nce with the invention; Fig. 2 is a. sectional View teken on the line 9. 2 in Fig. l; Fig. 3 is e fragmentary sectional View taken on the line 3-3 in l1 ig. 1, but with the piston omitted.; Fig. et is :i perspeotive View oi.r the piston end vene shown in Figs. l and 2; and Fig. 5 is e. perspective `View of the skew vane shown in F l, 2 and l.

lThe particular device selected toiilus trate the invention is but one o1 many possible concrete embodiments of the seine' The invention therefore is not to oe restricted to the precise details' of the perticulzir structure shown and described.

eferring to the drawings, 6 indicates a. cylinder formed in a easing 7. This eesing' has a party Wall 8 extending to the pe riphery of the cylinder and dividing an opening in the peripherai` Wall of the cylinder into two ports 9 and 10, one of which is e suction port and the other e delivery port. The party` Wall 8 is provided with s skew slot 1,1 open to the cylinder 6, and in this skew slot is located a skew vene 12 lmving e vent groove 13. The skev vane i2 slides in the ske7 slot l1, and es it slides outwardly it serves as en extension of the party Well '8 to always keep separate the pol-ts 9 end 1 0. i

.piston l5, York, have invented a new and useful ,of the cylinder is The outeredge of the skew vene l is plvoted or hinged in e veneretennng slot le formed in the periphery,T of :in iinvnulnr parallel with its exis. The piston l5 Works in the cylinderv 6, j' troif'eling in en o-rhitaf. ith therein. klli/leans are pio vided. for proflnoing this orbital movement and this ineens, in, the structure shown, includes e power shei't i6 haring :in .integral eccentric Within the Cylinder. Ball beni-ings 18ers .located Within the piste .l5 and surrounding eccentric ll. The inner peripherfes these bell ever, larger than the eccentric l?, end the purpose pressing1r the bell new out oi" concentricitjf seid ooeei l .wr 19 within t there provined s pres 'Cc-entri@ :i n d oxtendin tl iro u ,shout length. .springs Q0 @ire located in pockcls in the eccentric bases ot' bei 119.

cause erable l 1"( and piess'ageinst the the pockets and against the presser The purpose of this construction the piston lo to beer with consid pressure against the inne' peripl'ze u :i nieves thro-nih liis orbital mth, and nso to tekenp any it@ .r that may oeour the outer peripherr of the piston lnerinherv oltheif-r-iinder. A 'l L* As the power shaft i6 is rotated. the pieton l5 carried through its orbital with. and the materiel to beupuniped is soaked, through one ot' the portfr9`l0 and iirrced through the other. As the piston i either of the ports 9 or l0. 'theizidiellv werd thrust exerted on the piston lit' the springs E20- 20- is resisted bj? the hearing of the piston on the ledges et either side oi, the port- (see 3); end it passes the skew slot. il, lthe piston rides on to the fer Well of the slot before it le fes the neer Well, thus eliminating the hammering notion that would occur if the slot were perellel with the exis of the piston, and sensing the pump 'to run silently.A

llVhet is eleinied is: p

l. e rotary pump, the combination with e cjfiinder having en opening; in its peripheral well, et e piston inseid eylinder, ineens for producing :in orbital ino-vement of said piston in seid cylinder, e seeing having" :i party Well extending to tin periphery .of seid cylinder :11d dividin said opening` L nite tiro ports end provided hearings are. howwith an internal skew slot open to said cylinder, and a skew vane lnngedto said piston and working 1n said slot.

2. In a rotary pump, the. combination 5 with a cylinder having an openingr in its peripheral wall, of a piston in said cylinder',

` means for producing an orbitalmovement of said piston in said cylinder, a casing having a party wall extending to the periphery of said -cylinder and dividing said opening into two ports and provided with an internal skew slot open to said cylinder, and a skew vane working in said slot and hinged to said piston on a line.

parallel with its axis.

3. In a rotary pump, the combination with a cylinder having an openino` in its peripheral wall, ofapistonin said cylinder having a' vane-retaining slot in its periphery parallel with its axis, means for producing an orbital movementifof said `piston in said cylinder, a casing having a, party wall extending to the ,peripheryv of said cylinder and vdividing said opening into two ports and provided withian in-y than the inner) race ofwaidcball-gbearing, lneansor pressing `said*`ba,llbearing out.

of concentricity with said eccentric,a casing having la party wall extending to the W periphery. of said cylinder said opening into two ports andfpigovided with an internal skew slot'epen Atiofsaidrv .periphery of said cylinder and and dividing cylinder, and a skew vane hinged to said piston and working in said slot.

5. In a rotary 1: u1np,the combination with a cylinder having an opening in its peripheral wall, of an annular piston-in said cylinder,.aI hall bearing within said piston, means for producing an orbital movement of said piston in said cylinder including an eccentric within but smaller than the inner racc of said ball bearing, spring actuated means within said eccentric for pressing said ball bearing out of concentricity with said eccentric, a .casing having a party wall extending ton the dividing said opening into two ports and provided with an internal skew .slot open to said cylinder, andv a skew vane working in said slot and/ hinged to said piston on a line parallel with its axis.

6. In a rotary pump, the combination with a cylinder having an opening iu its peripheral wall, of an annular piston in said cylinder having a rane-retaining: slot in its periphery parallel with its axis, a ball bearing Within said piston, means for producing an orbital movement of said piston in said cylinder including an'ecccibl tric within but smaller than the inner of said 'ball bearing, spring actuated means Within said eccentric for pressingr said ball bearing out olf concentricity with saidA eccentric, a casing having `a party wall extendingr to the periphery of said cylinder and dividing said'opening into two ports and provided with an internal 'skew slot open to. said cylinder, and a skew vane working in said* skew slot and hinged in said'vane-retining slot.

In testimony whereof, I have signed my vnance to this specification. Y Y 'y i f v,VVI'LFORD J.. HAWKINS. 

